Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Moritz Spaeh

Helmut V Fuchs

Xueqin Zha

Gerhard Babuke

Dietmar Eckoldt

A low reverberating room for the entire auditory range. In particular, for ow frequency ranges below 100 Hz, in which the walls and ceiling are covered with sound absorbers. The sound absorbers on a surface of about 70-90% of a room, not including the floor, have a depth of &lt;0.5 m preferably &lt;0.3. The sound absorber also has a closed, plane but acoustically permeable surface, are built up of multiple layers. The sound absorbers are about 20-70% in similarity to composite-plate resonators. They are also provided with inside plates, made of metal or heavy foil, which are designed of varying thickness for absorption in various frequency ranges.

Growing community of inventors

Schwaebisch-Gmuend, Germany

Moritz Spaeh